Dec 02 08:46:29.585 INFO testing ChooChooShoe/rust-cardgame against 1.30.1 for beta-1.31-5
Dec 02 08:46:29.585 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-3/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 08:46:30.106 INFO [stdout] 8823ca01b42228c2db4045eb7b31b1303f410ca6ef7151ece6aea36788029d83
Dec 02 08:46:30.109 INFO running `"docker" "start" "-a" "8823ca01b42228c2db4045eb7b31b1303f410ca6ef7151ece6aea36788029d83"`
Dec 02 08:46:31.786 INFO [stderr] usermod: no changes
Dec 02 08:46:31.967 INFO [stderr]    Compiling log v0.4.5
Dec 02 08:46:33.187 INFO [stderr]    Compiling log v0.3.9
Dec 02 08:46:34.293 INFO [stderr]    Compiling mio v0.6.13
Dec 02 08:46:37.735 INFO [stderr]    Compiling ws v0.7.3
Dec 02 08:46:42.082 INFO [stderr]    Compiling cardgame v0.1.0 (/source)
Dec 02 08:46:42.115 INFO [stderr] error: Edition 2018 is unstable and only available for nightly builds of rustc.
Dec 02 08:46:42.115 INFO [stderr] 
Dec 02 08:46:42.115 INFO [stderr] error: Could not compile `cardgame`.
Dec 02 08:46:42.115 INFO [stderr] 
Dec 02 08:46:42.115 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 08:46:42.115 INFO [stderr] su: No module specific data is present
Dec 02 08:46:43.036 INFO running `"docker" "inspect" "8823ca01b42228c2db4045eb7b31b1303f410ca6ef7151ece6aea36788029d83"`
Dec 02 08:46:43.221 INFO running `"docker" "rm" "-f" "8823ca01b42228c2db4045eb7b31b1303f410ca6ef7151ece6aea36788029d83"`
Dec 02 08:46:43.519 INFO [stdout] 8823ca01b42228c2db4045eb7b31b1303f410ca6ef7151ece6aea36788029d83